完善对xpath获取数字结果的支持

DrissionPage/driver_element.py

@@ -685,8 +685,14 @@ class ElementsByXpath(object):
                     return e
 
             # 找不到目标时
+            except JavascriptException as err:
+                if 'The result is not a node set' in err.msg:
+                    try:
+                        return get_nodes(the_node, xpath_txt=self.xpath, type_txt='1')
                     except JavascriptException:
                         return None
+                else:
+                    return None
 
         elif self.mode == 'all':
             return ([DriverElement(x, self.page) if isinstance(x, WebElement)